B14 wants to over heat

[kaarel]

Hei

Due to the fackt that out side temperatures are rising and now daily temp. is plus 12, my b14 (cvt) wants to boil.
Problem is then when car idle´s at neutral or like yesterday road was very crap so had to drive about 800m with 15km/h.
Engine temp. went high the temperature red light didn´t flash yet but were quite close.When got normal speed up then the engine cooled down and every thing was fine.
Don´t think that is normal?

belt is old and quite wear-but don´t slip,have a new one but haven´t managed to fit it.
coolant is changed and radiator is fine to,don´t think is stuck too.
water pump doesn´t make sound,so should be ok ?
termostat is working.

Any ides?
K.

[Vermilion]

Does the radiator fan work? It should go on when the coolant reaches a certain temperature

[kaarel]

Yes fan is working.
Will do the radiator flush, may by it is stuck.

[Vermilion]

While you're at it get a new thermostat, maybe it doesn't work properly anymore

[morgan105]

What sort of condition is the radiator in?
If there are a load of missing mesh fins in the rad then it would be better to get it replaced.

Is your expansion tank cap the correct pressure rating?

[CBA]

Fan works, thermostat works, car only cools down when driving at speedz - water pump is worn out